Here's the code:

public ColumnHeader()
{
    ColumnHeader(null);
}
public ColumnHeader(ColumnHeaders Parent)
{
    InitializeComponent();
    lblCaption.Left = CAPTION_LABEL_MARGIN;
    lblCaption.Top = CAPTION_LABEL_MARGIN;

    if (Parent != null)
    {
        this.Parent = Parent;
    }
}

Getting "'ColumnHeader' is a 'type' but is used like a 'variable'". This only started happening after I put in the overload with no param.
The class name is ColumnHeader. The compiler doesn't complain about the CTOR with code in it.